摘要:
针对液气锤有效打击时间控制困难的问题,研究了液气锤工作过程的动力学特性,提出了分段时间控制方法。将液气锤的工作过程分成落锤、打击、反弹和回程4个连续阶段,为分析和求解4个阶段的有效时间范围,根据液气锤的工作原理建立了动力学模型和不同阶段的微分方程,利用Matlab对微分方程求解,并建立不同打击高度和能量下4个有效时间范围的样本。利用可编程逻辑控制器,结合有效时间样本,重新设计了液气锤的控制系统并应用于生产。实践证明:该方法简化了液气锤的部分机械结构,提高了操作的安全性,5000余次的锻打,未出现生产故障。
Abstract:
As it is difficult to control the effective forging time of the liquid-air hammer,its dynamics characteristic of the work process was researched,and the sub-time control method was proposed.The liquid-air hammer work process was divided into four continuous stages: drop hammer,hit,bounce and return.For analysis and solving the effective time range of four stages,the dynamic models and differential equations of different stages were established according to the hammer's works.Meanwhile differential equations were solved by Matlab.And samples of four effective time ranges were established on different hit heights and energy.The control system of liquid-air hammer,combined with effective time samples,was redesigned on the Programmable Logic Controller(PLC) and applied to production.The practice proves that this method is feasible for the simplification of some part of mechanical structure of the hammer,and improves operational safety.By more than 5 000 times forging,the system didn't appear any breakdown.
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